Support PORT environment variable

[bethesque]

Thanks for your work on this server! It has been very useful to our project.

I'd love to be able to run your mock server on Heroku. To do this, it needs to be able to honour the PORT environment variable. I've tried building my own docker image that extends your image and maps the PORT to SERVER_PORT, but it doesn't seem there's a shell environment installed on the image, and I can't find your source Dockerfile. Is this something you'd consider supporting? I would be happy to do a PR, but as mentioned, I can't find the source.

[ybelMekk]

Hi. I’m happy to hear that you find the server useful. We would love to have a PR! And the source file, yes, I need to reach out to my docker magician @jksolbakken you’ve been involved dealing with this right? 😅

May be this is this an alternative? https://github.com/navikt/mock-oauth2-server/#docker

[bethesque]

Ah, maybe there's some magic in the jibDockerBuild task that doesn't need a Dockerfile. I am totally not a JVM person, just relying on my ability to modify an existing build! I've got it running in my fork

You might want to add pull_request to the on: for the tests?

[ybelMekk]

@bethesque It is already there for PR´s 👍🏾

[bethesque]

Ah, I see, you've got a separate one for PRs 👍🏽

[ybelMekk]

@tronghn @tommytroen or @jksolbakken any comments on the PR? :)